Hello folks. I’m hoping to get some guidance on trouble shooting my cadets. I have moderate experience in euro DIY but this is my first foray into visual which makes the trouble shooting a bit trickier for me, and I wasn’t good at it to begin with.
I built a Cadet 21 type setup. By the time I had the case ready to go, I already had all the modules built up, which I realize isn’t great from a trouble-shooting perspective. I was expecting trouble, but what I am getting is absolutely no output at all. By no output I mean on the screen - I’m registering about 1.7V on output 1 and 0.7 on output 2. TVs do not recognize an incoming signal.
I’ve stripped it down to everything but the sync generator, the RGB encoder, and oscillators. The oscillators appear to be working, and I have patched them into the RGB inputs, but I can get neither of two TVs tested to recognize any signal coming through the RCA from the encoder.
Sadly I do not have an oscilloscope. I checked the 7805 and the voltage seemed normal. I’m hoping someone here can give me some guidance on what other voltages I can check and perhaps what readings I should expect, or where I might focus my attention.
I’ve gone over the soldering, but it is difficult to trace the circuit from the schematic without knowing the layout of the components on the board. I’ve checked the polarity of all the components.
Any tips or suggestions are much appreciated! Cheers.